I think she's more unhappy with the Pokemon itself. I don't know how she feels about how this turned out, but I think she drew it because she hated the Pokemon's design and wanted to draw it in a way that minimized what she disliked about it. c:

I could see them being from the same common ancestor, for sure. And seriously, Mawile and Sableye both need more love! They're so cool but they're practically unusable because of their stats. :[ One of the only things I've always hated about the Pokemon games.